Harmon Kardon has just announced a few new additions to their Guide + Play series. Including three models to choose from they have the GPS-310, GPS-510 and the GPS-810. All three units offer a 4-inch widescreen display, 2GB of internal memory, text-to-speech functionality as well as the standard GPS and PMP features.

The GPS-310 is the entry level model with the 510 and 810 both offering more features and functionality. The GPS-510 also offers real-time traffic info, additional video options, and support for SDHC cards. The GPS-810 also features a wireless rotary controller, built-in Bluetooth for hands-free calling and an FM transmitter.

The GPS-310 is expected to retail for $350, the GPS-510 for $450 and the GPS-810 will set you back $600. All three GPS units are expected to be available in November.